Bug 1207204

Submitted by mistake before filling in the info. Hence adding the info

Description of problem:
======================
When i tried to add a tier to EC volume, the bricks were consumed as though it was a distribute bricks.
That means the volume is getting converted to distribute-disperse.
There are no tier xattrs too.
We need to support tier with disperse/EC volume as this is a usecase where cutomers would want to use a cold tier as disperse type with the hot tier as SSDs


Version-Release number of selected component (if applicable):
============================================================
3.7 upstream nightlies build http://download.gluster.org/pub/gluster/glusterfs/nightly/glusterfs/epel-6-x86_64/glusterfs-3.7dev-0.821.git0934432.autobuild//

root@interstellar glusterfs]# gluster --version
glusterfs 3.7dev built on Mar 28 2015 01:05:28
Repository revision: git://git.gluster.com/glusterfs.git
Copyright (c) 2006-2011 Gluster Inc. <http://www.gluster.com>
GlusterFS comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of GlusterFS under the terms of the GNU General Public License.


Steps to Reproduce:
===================

1. Create a disperse volume and start it
   [root@interstellar ~]# gluster v create ec1 disperse-data 2 redundancy 1   transformers:/pavanbrick1/ec1/b1 interstellar:/pavanbrick1/ec1/b1 transformers:/pavanbrick1/ec1/rb1 force
volume create: ec1: success: please start the volume to access data
[root@interstellar ~]# gluster v start ec1
volume start: ec1: success
[root@interstellar ~]# gluster v status ec1
Status of volume: ec1
Gluster process                             TCP Port  RDMA Port  Online  Pid
------------------------------------------------------------------------------
Brick transformers:/pavanbrick1/ec1/b1      49160     0          Y       44215
Brick interstellar:/pavanbrick1/ec1/b1      49160     0          Y       40225
Brick transformers:/pavanbrick1/ec1/rb1     49161     0          Y       44235
NFS Server on localhost                     N/A       N/A        N       N/A  
NFS Server on 10.70.34.44                   N/A       N/A        N       N/A  
 
Task Status of Volume ec1
------------------------------------------------------------------------------
There are no active volume tasks

2.Now add a tier 
[root@interstellar ~]# gluster v attach-tier ec1 transformers:/pavanbrick2/ec1/hb1 interstellar:/pavanbrick2/ec1/hb1

3.check the vol info
[root@interstellar ~]# gluster v info ec1
 
Volume Name: ec1
Type: Distributed-Disperse
Volume ID: 1c47d8a3-f26f-4ef5-ad32-7da3462aaa61
Status: Started
Number of Bricks: 1 x (2 + 1) = 5
Transport-type: tcp
Bricks:
Brick1: interstellar:/pavanbrick2/ec1/hb1
Brick2: transformers:/pavanbrick2/ec1/hb1
Brick3: transformers:/pavanbrick1/ec1/b1
Brick4: interstellar:/pavanbrick1/ec1/b1
Brick5: transformers:/pavanbrick1/ec1/rb1



Expected results:
==================
support Tiering with EC properly.

[root@transformers glusterfs]# getfattr -d -e hex -m . /pavanbrick1/ec1/*
getfattr: Removing leading '/' from absolute path names
# file: pavanbrick1/ec1/b1
security.selinux=0x756e636f6e66696e65645f753a6f626a6563745f723a66696c655f743a733000
trusted.gfid=0x00000000000000000000000000000001
trusted.glusterfs.volume-id=0x1c47d8a3f26f4ef5ad327da3462aaa61

# file: pavanbrick1/ec1/rb1
security.selinux=0x756e636f6e66696e65645f753a6f626a6563745f723a66696c655f743a733000
trusted.gfid=0x00000000000000000000000000000001
trusted.glusterfs.volume-id=0x1c47d8a3f26f4ef5ad327da3462aaa61

[root@transformers glusterfs]# getfattr -d -e hex -m . /pavanbrick2/ec1/*
getfattr: Removing leading '/' from absolute path names
# file: pavanbrick2/ec1/hb1
security.selinux=0x756e636f6e66696e65645f753a6f626a6563745f723a66696c655f743a733000
trusted.glusterfs.volume-id=0x1c47d8a3f26f4ef5ad327da3462aaa61



[root@interstellar glusterfs]# getfattr -d -e hex -m . /pavanbrick1/ec1/*
getfattr: Removing leading '/' from absolute path names
# file: pavanbrick1/ec1/b1
security.selinux=0x756e636f6e66696e65645f753a6f626a6563745f723a66696c655f743a733000
trusted.gfid=0x00000000000000000000000000000001
trusted.glusterfs.volume-id=0x1c47d8a3f26f4ef5ad327da3462aaa61

[root@interstellar glusterfs]# getfattr -d -e hex -m . /pavanbrick2/ec1/*
getfattr: Removing leading '/' from absolute path names
# file: pavanbrick2/ec1/hb1
security.selinux=0x756e636f6e66696e65645f753a6f626a6563745f723a66696c655f743a733000
trusted.glusterfs.volume-id=0x1c47d8a3f26f4ef5ad327da3462aaa61

This should be addressed in bug 1206517 .

We no longer display "Distributed-Disperse" when a tier is attached. Fix 10054 made is such that the volume type is "tier". As this is the only problem referred to in this bug I am returning it. We will further change the volume info to separate out hot bricks from cold bricks but this is being tracked by 1206546.

This change should not be in "ON_QA", the patch posted for this bug is only available in the master branch and not in a release yet. Moving back to MODIFIED until there is an beta release for the next GlusterFS version.

This bug is solved in https://bugzilla.redhat.com/show_bug.cgi?id=1206517
And hence